Image Processing Apparatus Luminance Gain Adjustment
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Solution Overview
Problem
Existing image processing technologies face challenges in enhancing image clarity without exceeding digital value ranges, leading to artifacts and degraded image recognition due to excessive luminance gain.
Innovation Solution
An image processing apparatus and method that adjusts luminance gain based on original image luminance and threshold values to maintain luminance within expressible ranges, using a gain determination unit and gain adjustment unit to enhance clarity while preventing luminance overflow.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the gain of the luminance value is excessively increased to enhance clarity, then the clarity of the image is improved, but the luminance exceeds the range in which a digital value can be expressed, causing artifacts and degraded image recognition
Solution Approach 1:
The patent applies dynamics by making the gain value adjustable rather than fixed. The gain adjustment unit dynamically modifies the gain based on the original luminance of the image, allowing the system to adapt the luminance enhancement level to prevent exceeding digital value ranges while still improving clarity when needed.
Solution Approach 2:
The patent changes the parameter of gain value based on the original luminance of the image. By determining the gain according to the original luminance and adjusting it accordingly, the system optimizes the balance between enhancing clarity and maintaining luminance within expressible digital ranges.
2Measurement precision
If the gain of the luminance value is increased to improve clarity, then the clarity of fine portions is enhanced, but borders of the image may become dark and details may be degraded
Solution Approach 1:
The patent applies local quality by processing different portions of the image with different gain values. The gain adjustment unit determines gain based on the original luminance, allowing fine portions to receive enhanced clarity while preventing excessive gain that would cause border darkening and artifacts in other regions.
Data Source
AI summary
An image processing apparatus includes an image receiving unit, and an image processing unit which allows luminance of an image to be within a preset range of luminance and adjusts sharpness of the image. Accordingly, the problem that the luminance exceeds a digital value may be prevented, and the sharpness of the image may be effectively improved.